On top of playing possum. When they are cornered, they bare their teeth and hiss. They are not dangerous per-se.
But they do put on a good show.
Even if it is unlikely to spark an investigation, I feel it's a bit silly to post your crimes online. I have completed some of the items on this list but not all of them and I've completed some not listed:
speeding
trespassing
vandalism
theft
burglary
robbery
distribution
murder
rape
fraud
laundering
abuse
public intox
DUI
defacing a corpse
assault
assault with a weapon
kidnapping
assaulting officer
disorderly conduct
disturbing peace
your mom
There's this thing that skilled boxers do to tire out their opponents.
It's called "playing possum" The boxer goes all limp (like a real possum playing dead) and pretends he's whupped so the challenger will use up the best of himself and get overconfident.
Then the possumplaying fighter snaps back to his true form and kicks the challenger's butt.
Possum is extremely skilled at using this strategy in online debates.